Sensing and alarm function of resident memory CD8⁺ T cells.

Sensing and alarm function of resident memory CD8⁺ T cells.
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DOI:
10.1038/ni.2568
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发表时间:
2013-05
期刊:
影响因子:
30.5
通讯作者:
Masopust, David
Masopust, David
中科院分区:
医学1区
文献类型:
--
作者:
Schenkel, Jason M.;Fraser, Kathryn A.;Vezys, Vaiva;Masopust, David

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CD 8 + T细胞通过两种接触依赖性效应子功能消除细胞内感染:细胞溶解和抗病毒细胞因子分泌。在这里,我们确定了记忆CD 8 + T细胞在微生物暴露的前线部位持续存在的额外功能:作为先前遇到的抗原的局部传感器,沉淀先天性警报信号并将循环记忆CD 8 + T细胞吸引到组织中。当驻留在雌性生殖道中的记忆性CD 8 + T细胞遇到同源抗原时,它们表达干扰素-γ(IFN-γ),增强局部炎性趋化因子的表达,并诱导循环记忆性CD 8 + T细胞的快速募集。因此,前线组织中的记忆应答是前线和循环记忆CD 8 + T细胞群体之间的综合合作,疫苗应该建立两个群体以最大限度地提高快速应答。
CD8+ T cells eliminate intracellular infections through two contact-dependent effector functions: cytolysis and antiviral cytokine secretion. Here, we identify an additional function for memory CD8+ T cells persisting at frontline sites of microbial exposure: as local sensors of previously encountered antigens that precipitate innate-like alarm signals and draw circulating memory CD8+ T cells into the tissue. When memory CD8+ T cells residing in the female reproductive tract encountered cognate antigen, they expressed interferon-γ (IFN-γ), potentiated robust local inflammatory chemokine expression and induced rapid recruitment of circulating memory CD8+ T cells. Anamnestic responses in frontline tissues are thus an integrated collaboration between frontline and circulating populations of memory CD8+ T cells, and vaccines should establish both populations to maximize rapid responses.
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